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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a7ba07cd9ef1f88636cbb07f2cbb1e9b77aca9fbaa839c5cc915339140bd6c9' 
  AND token = 'nBN01MUIB27u4gKeOzATC1Nasydm3MARjZoKYSSm24s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}